India, July 30 -- Delhi witnessed heavy rainfall on Wednesday, though more showers are expected later in the night. The weather department did not issue any warning.

According to the Central Pollution Control Board, July 2025 was the cleanest in the past ten years, with an average Air Quality Index (AQI) of 79.

"The average AQI was 96 in 2024, 84 in 2023, 87 in 2022, 110 in 2021, 84 in 2020, 134 in 2019, 104 in 2018, 98 in 2017, 146 in 2016, and 138 in 2015," according to a PTI news agency report.

At 4 pm on Wednesday, the AQI was 66, which falls under the satisfactory category. An AQI between 0 and 50 is considered good. An AQI between 0 and 50 is considered good, 51 to 100 is satisfactory, 101 to 200 is moderate, 201 to 300 is poor, ...